Input/Output Module, Number of Inputs 4, For Use With 6ED10521CC010BA8, 6ED10521HB000BA8, 6ED10522CC010BA8, 6ED10522HB000BA8, 6ED10522MD000BA8, 6ED10580BA080YA1, Mfr. No. 6ED10521MD000BA8, Number of Outputs 4, Includes LOGO! DM8 12/24R expansion module, Power Required 12/24V DC, Features Relay, Product Type Input/Output Module